Paste insecticidal compositions
A paste insecticide bait to be contained in a pressurized container, for dispensing a semi-solid bead of bait in cracks, crevices and the like for destroying insects, in particular cockroaches, said composition comprising an oil-in-water emulsion of a pentadienone toxicant/fatty acid mixture in a corn syrup solution, together with oatmeal and, optionally, titanium oxide.
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A pressurized dispensable paste bait formulation was prepared and evaluated as shown in the following Examples.
EXAMPLE IA paste bait was prepared having the following composition by weight:
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Weight %
A, B C
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Corn Syrup 40.00 40.00
Pentadienone (CL 217,300)
2.00 2.00
Oleic Acid 8.00 8.00
Isopropanol 6.00 6.00
Methyl Paraben 0.20 0.20
Polyoxyethylene (5) 5.00 5.00
Stearyl Ether
Water 9.50 9.50
Oatmeal 14.00.sup.1
7.00.sup.2
Potassium hydroxide 0.17 0.17
Glycerin 2.00 2.00
Propyl Paraben 0.15 0.15
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.sup.1 Two identical compositions were prepared except for the type of
oatmeal. In Preparation A, hand ground oatmeal was used. In Preparation B
a commercially ground product, OATPRO.sup.r (ground 44 microns) was used.
.sup.2 OATPRO.sup.R oatmeal.
EXAMPLE II
The paste baits of Example I were tested in the laboratory against German cockroaches and compared with a gel bait disclosed in commonly assigned, copending application Ser. No. 07/441,594, filed Nov. 27, 1989 and against solid bait in a feed station described in U.S. Pat. No. 4,563,836, issued Jan. 14, 1986.
Material and MethodsThe compositions of Example I were tested against laboratory model infestations comprising populations of German cockroaches confined in test arenas and provided with harborage, water, and an abundant supply of alternate food. Test arenas consist of 18" square areas bounded by glass walls 6" high greased with a mixture of petrolatum and mineral oil to prevent cockroaches from escaping. Each arena contains a cardboard box (2.75.times.5.25.times.7.75 inches) harborage provided with an entrance slit and a liner of pleated corrugated cardboard strip (1.50.times.18") and a 2 ounce water bottle with paper towel wick. Harborage and water bottle are disposed against one wall of the arena. An alternate food supply of approximately 20 nuggets of PURINA.RTM. Cat Chow is distributed around the harborage entrance. Populations of approximately 25 German cockroaches of mixed ages and both sexes are installed in each arena by random allocation of a representative sample drawn from a rearing facility. Cockroach populations are installed approximately four days prior to the introduction of bait treatments into the arenas. Arenas are maintained at room temperature (70-80.degree. F.) throughout the test period.
Bait treatments are applied to model baseboards consisting of two 3.times.6' pieces of unfinished 1/4" plywood glued along a long edge to form an L-shaped profile or to glass plates 6" square. Baits are applied at the rate of approximately 5 grams of product per arena. Bait treatments are assigned to arenas in a completely randomized manner.
Mortality of each arena is assessed seven days after the introduction of bait treatments. Cockroaches not responding with greater than one body-length of escape motion upon prodding of cerci by forceps are classified as dead. The results are shown in Table II below.
TABLE II
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Efficacy Test Results
Mean Percent Reduction
Treat at Day 7
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Paste Bait 13355 with
89%
ground oatmeal
Paste Bait 13355 with
89%
OATPRO.sup.R
COMBAT Feeding Station 9490
89%
COMBAT Gel Bait 13581
79%
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Claims
1. An insecticidal paste composition for application from a pressurized container for destroying cockroaches which comprises, by weight, 30% to 50% corn syrup, 0.25% to 2.5% of a pentadienone insecticide, 3% to 6% polyoxyethylene (5) cetyl stearyl ether, 0.10% to 0.2% of at least one antimicrobial agent, about 0% to 5% isopropanol, about 1% to 10% oleic acid, 15% to 30% water, 0.1% to 0.2% of a base, 1% to 5% polydimethyl siloxane, 0% to 3% glycerin, and 5% to 18% oatmeal.
2. The composition of claim 1 wherein said pentadienone is a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 each represent hydrogen, halogen, the group --CF.sub.3,C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, or C.sub.1 -C.sub.4 alkylthio;
- R.sub.3 is hydrogen or methyl, provided that when R.sub.3 is methyl both R.sub.1 and R.sub.2 are
- R.sub.4 and R.sub.5 represent hydrogen, C.sub.1 -C.sub.4 alkyl or when taken together, an alkylene group of 2 to 6 carbon atoms, methyl or phenyl alkylene group of 2 to 6 carbon atoms of 2-cyclohexylene; and
- R.sub.6 is hydrogen or C.sub.1 -C.sub.4 alkyl; and salts thereof.
3. The paste composition of claim 2 wherein said base is potassium hydroxide.
4. A method for destroying cockroaches which comprises dispensing the composition of claim 2 from a pressurized container and depositing said composition as a semi-solid bead of material along cracks and crevices of cockroach harborages.
5. The paste composition of claim 2 containing a whitening-effective amount of titanium dioxide.
Type: Grant
Filed: Dec 12, 1990
Date of Patent: Jun 30, 1992
Assignee: The Clorox Company (Oakland, CA)
Inventor: Daniel C. Geary (Randolph Township, Morris County, NJ)
Primary Examiner: Thurman K. Page
Assistant Examiner: William E. Benston, Jr.
Attorney: Harry A. Pacini
Application Number: 7/626,660
International Classification: A01N 2508;
